Re: 1988 90q performance variations

["Mike Benno" <mbenno@mr.net>]

I have had the same problem for nearly two years, my revs almost seem
restricted. additionally, my gas mileage is down.

I've explained this problem to my mechanic and we have tried to replace
several components (O2 sensor, Fuel Filter, plugs, rotor, air filter) but
still the problem persists. They even tried to find a vacuum leak. They say
the car is tight as a drum, however, my mileage is down to 16.8 mpg from
about 19.8 mpg for the same driving.

The only other possible area I can think of is the Mass Air Flow sensor,
but at $240 for replacement it seems a little high to just find out....

Someone suggested that I may have a partially clogged cat, this possible?

I am interested in your problem and I wonder if it is related.....if you
come up with any solutions let me know. I am about ready to give up on the
mechanics.

Michael Benno
90q20v

----------
> From: KSMITH1@mailgw.sanders.lockheed.com
> To: quattro@coimbra.ans.net
> Subject: 1988 90q performance variations
> Date: Friday, March 07, 1997 1:50 PM
> 
> I have recently driven a 1988 90q 5 speed, 10V (of course), that is 
> effectively (and apparently) identical to mine, in equipment and 
> mileage  It seems peppier (freer and faster revving), on both part and 
> full throttle.  I use premium unleaded gas.  My O2 sensor and fuel 
> pump were recently changed, and air filter last fall.  My car does not 
> manifest any of the obvious signs of catalytic converter gagging.  My 
> understanding is that the ignition timing is computer controlled and 
> thus presumably the same for each car.  Is this true?  Is there a 
> knock sensor that could be defective and improperly retarding the 
> spark?  The dark look of my exhaust pipe would suggest I'm not running 
> lean, in general.  I haven't yet done a compression test.  Is there 
> anything in particular I should look for?
> 
> Thanks in advance
> 
> ***                 ...Kirby    (Kirby A. Smith)                 ***
> ***              ksmith1@mailgw.sanders.lockheed.com             ***
> ***              [=]   kirby.a.smith@lmco.com                    ***
> ***  Opinions expressed herein are entirely those of the author. ***